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TECHNICAL SPECIFICATION
LTE;
Functional architecture and information flows to support
Mission Critical Push To Talk (MCPTT);
Stage 2
(3GPP TS 23.379 version 14.7.0 Release 14)
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3GPP TS 23.379 version 14.7.0 Release 14 1 ETSI TS 123 379 V14.7.0 (2018-10)
Reference
RTS/TSGS-0623379ve70
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3GPP TS 23.379 version 14.7.0 Release 14 2 ETSI TS 123 379 V14.7.0 (2018-10)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
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Modal verbs terminology
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ETSI
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3GPP TS 23.379 version 14.7.0 Release 14 3 ETSI TS 123 379 V14.7.0 (2018-10)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 10
1 Scope . 11
2 References . 11
3 Definitions, symbols and abbreviations . 12
3.1 Definitions . 12
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Introduction . 14
5 Architectural requirements . 15
5.1 Media routing requirements . 15
5.2 Requirements for user identity management . 15
5.3 MCPTT group affiliation and MCPTT group de-affiliation . 15
5.4 MCPTT call requirements . 15
5.4.1 General . 15
5.4.2 Group call requirements . 15
5.5 GCS AS requirements for the MCPTT service . 15
5.6 Group selection . 15
5.7 Bearer management . 16
5.7.1 General . 16
5.7.2 EPS bearer considerations . 16
5.7.2.1 Void. 16
5.7.2.2 Void. 16
5.7.3 EPS unicast bearer considerations for MCPTT . 16
5.7.4 MBMS bearer management . 16
5.8 MCPTT system interconnect requirements . 17
6 Involved business relationships . 17
7 Functional model . 17
7.1 General . 17
7.2 Description of the planes . 17
7.3 Functional model description . 17
7.3.1 On-network functional model . 17
7.3.2 Off-network functional model . 18
7.4 Functional entities description . 19
7.4.1 General . 19
7.4.2 Application plane of MCPTT service . 19
7.4.2.1 General . 19
7.4.2.2 Common services core . 19
7.4.2.3 MCPTT application service . 19
7.4.2.3.1 MCPTT client . 19
7.4.2.3.2 MCPTT server . 19
7.4.2.3.3 Floor participant . 21
7.4.2.3.4 Floor control server . 21
7.4.2.3.5 Media distribution function . 21
7.4.2.3.6 Media mixer . 21
7.4.2.3.7 MCPTT user database . 21
7.4.3 Signalling control plane . 21
7.5 Reference points . 21
7.5.1 General reference point principle . 21
7.5.2 Application plane of MCPTT service . 22
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3GPP TS 23.379 version 14.7.0 Release 14 4 ETSI TS 123 379 V14.7.0 (2018-10)
7.5.2.1 General . 22
7.5.2.2 Reference point MCPTT-1 (between the MCPTT client and the MCPTT server). 22
7.5.2.3 Reference point MCPTT-2 (between the MCPTT server and the MCPTT user database) . 22
7.5.2.4 Reference point MCPTT-3 (between the MCPTT server and the MCPTT server) . 22
7.5.2.5 Reference point MCPTT-4 (unicast between the floor control server and the floor participant) . 22
7.5.2.6 Reference point MCPTT-5 (between the media distribution function and the EPS) . 22
7.5.2.7 Reference point MCPTT-6 (between the MCPTT server and the EPS) . 23
7.5.2.8 Reference point MCPTT-7 (unicast between the media distribution function and the media
mixer) . 23
7.5.2.9 Reference point MCPTT-8 (multicast between the media distribution function and the media
mixer) . 23
7.5.2.10 Reference point MCPTT-9 (multicast between the floor control server and the floor participant) . 23
7.5.2.11 Reference point IWF-1 (between the MCPTT server and the interworking function to legacy
s yste ms) . 23
7.5.2.12 Reference points of common services core used in the MCPTT service . 23
8 Identities . 23
9 Application of functional model to deployments . 23
10 Procedures and information flows . 24
10.1 MCPTT service configuration . 24
10.2 User authentication and authorization for MCPTT service . 24
10.3 Affiliation and de-affiliation to/from MCPTT group(s) . 24
10.4 MCPTT group selection . 25
10.4.1 General . 25
10.4.2 Information flows for group selection . 25
10.4.2.1 Group selection change request. 25
10.4.2.2 Group selection change response . 25
10.4.2.3 Group selection change notification . 25
10.4.3 Authorized user remotely changes another MCPTT user's selected MCPTT group – mandatory mode . 26
10.5 Pre-established session (on-network) . 27
10.5.1 General . 27
10.5.2 Information flows for pre-established session . 27
10.5.2.1 Pre-established session establishment . 27
10.5.2.2 Pre-established session modification . 28
10.5.2.3 Pre-established session release - client initiated . 28
10.5.2.4 Pre-established session release - server initiated . 28
10.5.2.5 Pre-established session call connect request . 29
10.5.2.6 Pre-established session call disconnect request . 29
10.5.3 Procedures. 29
10.5.3.1 General . 29
10.5.3.2 Call connect and disconnect procedures using pre-established session . 30
10.5.3.2.1 Call connect over unicast . 30
10.5.3.2.2 Call disconnect over unicast . 30
10.6 Group call . 31
10.6.1 General . 31
10.6.2 On-network group call . 31
10.6.2.1 General . 31
10.6.2.2 Information flows for group call in on-network . 31
10.6.2.2.1 MCPTT emergency group call request . 31
10.6.2.2.1a MCPTT emergency group call response . 31
10.6.2.2.2 MCPTT emergency group call cancel request . 32
10.6.2.2.2a MCPTT emergency group call cancel response . 32
10.6.2.2.3 MCPTT emergency alert request . 32
10.6.2.2.3a MCPTT emergency alert response . 33
10.6.2.2.3b MCPTT emergency alert area trigger . 33
10.6.2.2.4 MCPTT emergency state cancel request . 33
10.6.2.2.4a MCPTT emergency state cancel response . 33
10.6.2.2.5 MCPTT imminent peril group call request . 33
10.6.2.2.5a MCPTT imminent peril group call response . 34
10.6.2.2.6 MCPTT imminent peril group call cancel request . 34
10.6.2.2.6a MCPTT imminent peril group call cancel response . 34
ETSI
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3GPP TS 23.379 version 14.7.0 Release 14 5 ETSI TS 123 379 V14.7.0 (2018-10)
10.6.2.2.7 Group call request (MCPTT client – MCPTT server) . 34
10.6.2.2.8 Group call request (MCPTT server – MCPTT server) . 35
10.6.2.2.9 Group call request (MCPTT server – MCPTT client) . 35
10.6.2.2.10 Group call response (MCPTT server – MCPTT client) . 35
10.6.2.2.11 Group call response (MCPTT server – MCPTT server) . 36
10.6.2.2.12 Group call response (MCPTT client – MCPTT server) . 36
10.6.2.2.13 Group call notify (MCPTT server – MCPTT client) . 36
10.6.2.2.14 Group call release request (MCPTT server – MCPTT client) . 37
10.6.2.2.14a Group call release request (MCPTT client – MCPTT server) . 37
10.6.2.2.15 Group call release request (MCPTT server – MCPTT server) . 37
10.6.2.2.16 Group call release response (MCPTT client – MCPTT server) . 37
10.6.2.2.17 Group call release response (MCPTT server – MCPTT server) . 37
10.6.2.2.18 Group call rejoin request (MCPTT client – MCPTT server) . 38
10.6.2.2.19 Group call rejoin response (MCPTT server – MCPTT client) . 38
10.6.2.2.20 Group join request (MCPTT client – MCPTT server) . 38
10.6.2.2.21 Group join response (MCPTT server – MCPTT client) . 39
10.6.2.2.22 Group call leave request (MCPTT server – MCPTT client) . 39
10.6.2.2.23 Group call leave response (MCPTT client – MCPTT server) . 39
10.6.2.2.24 Group interrogate request (MCPTT server – MCPTT server) . 39
10.6.2.2.25 Group interrogate response (MCPTT server – MCPTT server) . 39
10.6.2.2.26 Group-broadcast group call request (MCPTT client – MCPTT server) . 40
10.6.2.2.27 Group-broadcast group call request (MCPTT server – MCPTT client) . 40
10.6.2.2.28 Group-broadcast group call response (MCPTT client – MCPTT server) . 40
10.6.2.2.29 Group-broadcast group call response (MCPTT server – MCPTT client) . 41
10.6.2.2.30 Group-broadcast group call release request (MCPTT client – MCPTT server) . 41
10.6.2.2.31 Group-broadcast group call release request (MCPTT server – MCPTT client) . 41
10.6.2.2.32 Group-broadcast group call release response (MCPTT server – MCPTT client) . 41
10.6.2.2.33 Group-broadcast group call release response (MCPTT client – MCPTT server) . 42
10.6.2.3 Group call within one MCPTT system. 42
10.6.2.3.1 Group call models. 42
10.6.2.3.1.1 Pre-arranged group call . 42
10.6.2.3.1.2 Chat group call . 47
10.6.2.3.2 Exiting group call due to de-affiliation . 51
10.6.2.4 Group call involving groups from multiple MCPTT systems . 52
10.6.2.4.1 Group call for temporary groups across multiple MCPTT systems . 52
10.6.2.4.1.1 Group call setup . 52
10.6.2.4.1.2 Group call release . 55
10.6.2.4.2 Group call for temporary group formed by group regroup procedure involving multiple
MCPTT systems via trusted mode . 56
10.6.2.4.3 Group call for an MCPTT group defined in the partner MCPTT system . 58
10.6.2.4.3.1 Group call setup procedure – initiating side . 58
10.6.2.4.3.2 Group call setup – terminating side . 59
10.6.2.4.4 Merging of groups involving multiple MCPTT systems . 59
10.6.2.5 Broadcast group call . 60
10.6.2.5.1 General . 60
10.6.2.5.2 Common broadcast group call procedure . 61
10.6.2.5.2.1 Group-broadcast group call procedure . 61
10.6.2.5.2.2 Group-broadcast group call procedure when a subordinate group has an on-going MCPTT
emergency group call . 63
10.6.2.5.2.3 Group-broadcast group call release procedure . 64
10.6.2.5.3 Temporary group – broadcast group call procedure . 65
10.6.2.6 Emergency and imminent peril procedures . 67
10.6.2.6.1 MCPTT emergency group call . 67
10.6.2.6.1.1 MCPTT emergency group call commencement. 67
10.6.2.6.1.2 MCPTT group call upgraded to an MCPTT emergency group call . 69
10.6.2.6.1.3 MCPTT emergency group call cancel . 71
10.6.2.6.2 MCPTT imminent peril group call . 73
10.6.2.6.2.1 MCPTT imminent peril group call commencement . 73
10.6.2
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